Intake-manifold heater



Nov 4 A9244 W. G. DUNN INTAKE MANI FOLD HEATER 1925 2 Sheets-Sheet 1 K53EM Filed Dec 10 wwwhoz w th two I NTAKE MANIFOLD HEATER Filed Dec. 10,1923 2 Sheets-8heet 2 50 equipped with my invention.

: To all whom it may concern:

Patented Nov. 4,1924. V j 4 UNITED STATES PATENT OFFICE.

I e. nunn,. on 01.4 m, IOWA. I w I I v i 1' 7' I MAKE-MANIFOLD nm'rnn.Application filed December 1c, 1923. saris! no. erases.

Be it known that I, WmnmM-G. DUNN, a in Flg'. 1, and the insert and exaust manicitizen of the United States, residing at fold at the oppositeside of the motor. Clarinda, in the county of Page and State Figures 4and 5 are 'vertical transverse of Iowa, have invented certain new andusesectional views through the invention, cut in ful Improvements inIntake-Manifold Heatplanes between the'front and rear pairs of rs; and Ido declare the following to be a -c llnders of the motor, one viewdisclosing full, clear, and. exact description of the invention, such aswill enable others skilled ,in the art to whichitappertains to make anduse the same.

My invention r elates to improvements in .intake manifold heaters whichprovide what e travel of the shunted exhaust gases while the otherindicates the return of such gases.- Figure 6 is a vertical sectionalview on line 66 of Fig. 4, showing more particularly the construction ofthe insert.

Figure 7 is avertical transverse sectional is commonly known as a hotspot on-the view, illustrating a slightly different form manifold, intocontact with which the gases of construction, in which the insert is notfrom the carburetor are directed, so as to employed. Q

heat such gases and increase their volatility i d, ffi i De i f thiature have the numeral 1 designates an intake manifold heretofore beenprovided, but it isone ohwhich is substituted for the manifold prejectof my invention to provide a unique lviously used on a well known typeof interassociation of intake manifold, heater. and nal combustionmotor, such as that indicatedcarbureter, all seciired together by a.single at 2. The lower side of the manifold 1 is set of bolts, thearrangement being such 'as' "formed with a gas inlet opening 3 and is togreatly elevate the carbureter over its flat around this opening, asindicated at 4.

usual position, with the advantage that the The manifold 1 is alsoformed with a flat ingoing gases have only a short traveland upper side5 and is provided with vertical consequently cannot condense and partlyrebolt holes 6 opening through the lower and turn to the carbureter.upper flat surfaces 4 and 5, sleeves 7 being Another object of theinvention is to'proformed vertically across the interior of the vide aunique insert adapted primarily to be manifold, so that the bolt holes 6may pass vintroduced between the cylinder head of a, through thesesleeves and there will he no 4 motor and the exhaust nanifold, saidinsert danger of air leaks into the manifold. having a gas shuntingpassage for supplying hot exhaust gases to the heater above menitsnormal position and has its attaching and are drawn from the other bysuction.

tioned, and also being provided with a reflange 9 disposed against theflat lower face turn passage for the shunted' ases, thear 4 o themanifold 1, so that the ingoin rangementbeing such that t e gases aregases need only travel a slight distance an forced through theone'passage b'ypressure. there isconsequently no danger of any of -thesegases condensing and returning to the Yet another aim is to provide anattachcarbureter. An open-bottomed head 10 rests Figure 3 is a plan viewof the arts shown In the drawings above briefly described,..

'-'Ihe usual carbureter 8 is elevated above ment for motors now in everyday use which on the fiat upper face 5 of the manifold 1 will be simpleand inexpensive, and maybe and receives exhaust gases from the motor, to

quickly and easily applied.

0 v heat the upper s'ide'of said manifold, di- With the foregoing inview, the invention rectly over the opening 3, so as to effectivelyresides inthe novel subject matter hereinheat the gases entering themotor. A single after described and claime'd,-the description set ofbolts 11 pass through the bolt holes 6, being supplemented by Y theaccompanying through feet 12 of the head 10 and through drawings, Y theattaching flange 9 of the carbureter 8, so 7 Figure 1 is a sideelevation, partly in See-- that these bolts tightly tie the three partstion showing a well known type of motor. 1, 8 and 10 together.

. I At the side of the motor, opposite the in- Figure 2 is a persiective view showing the take manifold 1, is the exhaust manifold 13,assembly of the inta e manifold, carbureter, and in Fig. 7, I haveillustrated a pipe 14 manifold heater, insert and connecting pipestapped into. said manifold 13 and leading gases to the latter. From thehead 10, a flexible exhaust pipe 15 leads and if desired may join themain exhaust pipe of the motor at a suitable point.

Instead of using the construction disclosed in -Fig. 7, it is preferableto employ that illustrated in the other figures. I provide a verticallyelongated insert 16 which is adapted to be introduced between thecylinder head and the manifold 13, said insert having flat inner andouter sides to engage suitable gaskets (not shown) and having openings17 aligning with the usual openings in the manifold and cylinder head,to receive attaching screws 18. The lower end portion of the insert 16is formed with a main exhaust passage 19 which extends entiiely throughthe body and the upper end portion of said insert is hollow and itsinterior communicates with the passage 19, said interior being dividedby a vertical partition 20, into' an exhaust gas shunting passage 21 anda return passage 22 for the shunted gases. The side wall of the passage21, remote from the cylinder head, is formed with a depending lip 23which joins to the partition 20 and serves to direct the outgoingexhaust gases, or rather some of these gases, upwardly into the passage21. The opposite side wall of the return passage 22 is provided with asimilar lip 2 1 which guards the passage 22 against the entrance ofexhaust gases from the passage 19 and causes these gases to create asuction within said passage 22. A pipe 25 leads from the gas shuntingpassage 21, to the head 10, and another pipe 26 returns from said headto the gas return passage 22, and it will thus be seen that a continualcirculation of hot exhaust gases will take place through the passage 21,pipe 25, head-10, pipe 26, and return passage 22. Thus, a hot spot ismaintained at the top of the manifold 1, to effectively heat the gasesentering the cylinder head.

It wil be seen from the foregoing, that I have provided a simple andinexpensive construction for utilizing some of the exhaust gases to heata portion of the exhaust manifold and thus increase the volatility ofthe gases entering the cylinders, from the carbureter. It will alsobenoted that the invention may be easily installed and will necessitatefew changes in the construction of the motor with which it is used.Attention may be directed to the fact however, that as the carbureter-8is elevated, some changes must be made in the throttle control means, asindicated in Fig.1 In this view, a bracket 27 has been shown,zsecured tothe motor base. Upon this bracket, a bell crank 28 is mounted and fromthis bell crank, a vertically elongated rod 29 leads to the throttlevalve of the carbureter. An ac celerator rod 30 is connected with thebell thereof to open the throttle Valve to a greater or less extent.

Excellent results have been obtained from the details above describedand they are therefore preferably followed, but within the scope of theinvention as claimed, numerous minor changes may be made.

I claim:

1. The combination with an internal combustion engine having an exhaustmanifold at one side of the cylinder head and an intake manifold at theopposite side of said head; of an open-bottomed casing secured upon theupper side of said intake manifold and closed by the latter, said casingextending above the cylinder head, a passage member communicating withthe interior of the exhaust manifold and extending therefrom above thecylinder head, an exhaust gas passage extending over the cylinder headand connecting said passage member with said casing, and an exhaust gasoutlet from'said casing.

'2. An attachment for internal combustion engines comprising a hollowhead adapted to be secured on an intake manifold, an insert adapted forintroduction into an exhaust gas passage, said insert having an haustgas shunting passage and a return passage forthe shunted exhaust gases,and

separate passages connecting said passages of the insert with saidhollow head.

3. An attachment for internal combustion motors comprising an insertadapted to be introduced into an exhaust gas passage of a motor, saidinsert having an exhaust gas shunting passage and a return passage forthe shunted gases, said. passages'bein'g adapted for connection with aheater to circulate th hot exhaust gases therethrough.

4. An attachment for internal combustion motors comprising an insertadapted to be introduced into an exhaust gas passage of a motor, saidinsert comprising an elongated body having a main exhaust gas passageopening therethrough at one end of the body, the other end of said bodybeing hollow-and having its interior in communi- '5. An intake manifoldhaving an inlet opening in its lower 'side and' a fiat face about saidopening, said manifold also having a fiat upper face over said openingand vertical bolt holes opening through the flat upper and lower faces acarbureter an attaching flange contacting with the t lower face, aheater contacting with the flat upper and. bolts in said. bolt holespassing also through said flange and said heater 10 to secure the heaterand carbureter to the manifold.

In testimony whereof I ve hereunto afmy v liiziufw;

